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Comparison of the ICare® rebound tonometer with the Goldmann tonometer in a normal population
Author(s) -
Fernandes P.,
DíazRey J. A.,
Queirós A.,
GonzalezMeijome J. M.,
Jorge J.
Publication year - 2005
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.2005.00327.x
Subject(s) - goldmann applanation tonometer , intraocular pressure , ophthalmology , medicine , applanation tonometry , population , optometry , blood pressure , arterial stiffness , environmental health
The aim of this study was to evaluate the accuracy of measurement of intraocular pressure (IOP) using a new induction/impact rebound tonometer (ICare®) in comparison with the Goldmann applanation tonometer (AT). The left eyes of 46 university students were assessed with the two tonometers, with induction tonometry being performed first. The ICare® was handled by an optometrist and the Goldmann tonometer by an ophthalmologist. In this study, statistically significant differences were found when comparing the ICare® rebound tonometer with applanation tonometry (AT) ( p < 0.05). The mean difference between the two tonometers was 1.34 ± 2.03 mmHg (mean ± S.D.) and the 95% limits of agreement were ±3.98 mmHg. A frequency distribution of the differences demonstrated that in more than 80% of cases the IOP readings differed by <3 mmHg between the ICare® and the AT. In the present population the ICare® overestimates the IOP value by 1.34 mmHg on average when compared with Goldmann tonometer. Nevertheless, the ICare® tonometer may be helpful as a screening tool when Goldmann applanation tonometry is not applicable or not recommended, as it is able to estimate IOP within a range of ±3.00 mmHg in more than 80% of the population.